JPH06178808A - Infusion apparatus - Google Patents

Abstract

PURPOSE:To achieve higher safety of an infusion apparatus by improving detection accuracy of bubbles mixed into an infusion. CONSTITUTION:A bubble sensor BS1 which has an ultrasonic transmitter 60s and an ultrasonic receiver 60r facing each other is mounted on an outer circumferential surface of an infusion tube 50. The bubble sensor BS1 detects a bubble cross section occupying rate as a ratio of a sectional area SB of bubbles 80 in the section area ST of the infusion tube 50. The size BB of the bubble to be detected, an infusion rate W and an amount A of infusion are inputted by a numeric key to calculate a forcing speed V of the infusion from the infusion rate W an the sectional area ST of the tube and a mixing allowable amount alphaREF of bubble per 10mu1 is calculated based on the size BB of the bubble and the infusion rate. The amount of bubble per 10mu1 is calculated from an output level of the bubble sensor BS1 and the forcing speed V and a stepping motor is stopped when the amount of the bubble per 10mu1 exceeds the alphaREF.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion device used as an intravenous infusion device for drip or the like, in which a drug is selected and the infusion amount and infusion rate of the drug are designated to pump the infusion. .

[0002]

2. Description of the Related Art An infusion device has a middle portion of an infusion tube having a drug solution bag connected to one end and an injection needle connected to the other end, and an infusion solution in the infusion tube (for example, by driving a linear peristaltic infusion pump). The drug solution is pumped and injected into the patient's body.

By the way, it is not preferable that air is mixed in the drug solution injected into the body of the patient. If the size of the bubbles is very small or the amount of bubbles is very small, it is acceptable to some extent, but if the size and amount of bubbles exceed a certain value, it will adversely affect the living body. In some cases, it may lead to a life threat.

Therefore, in the infusion device of this type, conventionally, a bubble sensor is generally provided so that an abnormal process is performed when a bubble is detected. Bubble sensor BS
FIG. 23 shows the second conventional example. On the outer peripheral surface of the liquid transfusing tube 100, a pair of ultrasonic sensors 110 and 120 are arranged at a predetermined interval X along the flow direction of the liquid transfusing. The first ultrasonic sensor 110 is an ultrasonic wave transmitter 110s.
And an ultrasonic wave receiver 110r.
0 is in contact with the outer peripheral surface. Second ultrasonic sensor 12
The configuration of 0 is similar, and the ultrasonic wave transmitter 120s and the ultrasonic wave receiver 120r are arranged so as to face each other in the radial direction on the outer peripheral surface of the infusion tube 100.

[0005] In a state where the infusion solution (medicine solution) 200 is passing through the infusion tube 100 with respect to the ultrasonic wave transmission path connecting the ultrasonic wave transmitter and the ultrasonic wave receiver, the ultrasonic wave passes through the infusion solution. In order to propagate well, the reception level of the ultrasonic wave receiver is high, and the output level of the ultrasonic wave receiver becomes a predetermined value or more. However, as shown in (a) of FIG. 23, the bubbles 300 are mixed in the infusion solution 200 in the infusion tube 100, and when the bubbles 300 pass through the ultrasonic wave transmission path, the propagation rate of the ultrasonic waves is significantly increased. And the output level of the ultrasonic receiver drops extremely. The mixing of the air bubble 300 is detected by judging the extreme decrease in the output level of the ultrasonic wave receiver, and the first and second ultrasonic wave sensors 110, 1 are provided.
When the output levels of both ultrasonic wave receivers 110r and 120r in FIG. 20 are both low, (a) in FIG.
As described above, it is assumed that the bubble 300 having a size equal to or larger than the distance X between the two ultrasonic sensors 110 and 120 is detected. In that case, the drive of the peristaltic infusion pump is stopped and an alarm or warning is displayed.

In addition, in the conventional infusion device, the drug is set in the infusion device based on an instruction such as a prescription before the infusion, and information such as the infusion amount, the infusion rate, and the infusion time is manually input to the infusion device. Was being done. Also, in some infusion devices, the infusion device and the infusion device management device are connected by a communication line such as a telephone line, and commands such as infusion volume, infusion speed, and infusion time are transmitted from the infusion device management device through the communication line. I was setting it.

[0007]

In the case of the bubble sensor BS2 in the above-mentioned conventional infusion device, the bubble 3 which can be detected.
The size of 00 is defined by the distance X between the two ultrasonic sensors 110 and 120. This distance X is unique to the bubble sensor BS2, and therefore the size of the bubble that can be detected. The lower limit value of will be fixed to a fixed value. Therefore, the size of the bubble to be detected cannot be arbitrarily adjusted according to the patient such as children and adults, and the bubble sensor BS2 corresponding to each patient must be replaced.

Further, as shown in FIG. 23 (b), when passing through the bubble sensor BS2, a plurality of divided bubbles 3 are formed.
Even if 00a and 300b are collected into one after passing, and the size of the bubbles when they are collected is such that the pump must be stopped or a warning should be displayed, the bubbles pass through the bubble sensor BS2. In the stage, the output levels of the two ultrasonic wave receivers 110r and 120r do not simultaneously become low levels, and the bubble sensor BS2 is in a non-detection state, which may adversely affect the living body. Infusion tube 100 upstream of bubble sensor BS2
When the operator continues to infuse the fluid for a long time without noticing the abnormality, the air bubble sensor BS2 cannot detect it because the air bubble sensor BS2 is small and the infusion fluid has a long time. As a result, there is a possibility that the degree of adverse effects on the living body may increase.

Moreover, since the bubble sensor requires two sets of ultrasonic sensors, the bubble sensor is large.

The present invention was devised in view of such circumstances, and it is an object of the present invention to improve the accuracy of detecting bubbles mixed in an infusion solution and increase the safety of the infusion apparatus.

Further, in the conventional infusion device, there is a possibility that an erroneous drug may be injected due to an operator's misuse when the drug is set in the infusion device. Infusion volume, infusion rate,
There is a possibility that an incorrect value may be input due to an erroneous operation by the operator when manually inputting information such as infusion time.

The present invention was devised in view of such circumstances, and an object thereof is to prevent erroneous use of medicines and input errors of various information due to manual work.

[0013]

A first infusion device according to the present invention is an infusion device for compressing an infusion tube by an infusion pump mechanism section to pump an infusion solution in the infusion tube, which is in the middle of the infusion tube. A bubble sensor composed of an ultrasonic wave transmitter and an ultrasonic wave receiver, which are arranged opposite to each other with the tube sandwiched therebetween, is provided on the outer peripheral surface of the part, a means for setting the size of the bubble to be detected, the infusion rate and the infusion rate. A means for setting the amount, a means for calculating the pumping speed of the infusion based on the infusion rate and the cross-sectional area of the tube, and a bubble which is allowed to be mixed in the unit volume based on the size of the bubble to be detected and the infusion rate. A means for calculating the amount, a means for calculating the bubble integral value per unit volume based on the pumping speed of the infusion solution and the output level by the bubble sensor, and the bubble integral value per unit volume is mixed in the unit volume. Is characterized in that it comprises means for determining whether more than capacity amount of bubbles, and means for stopping the infusion pump mechanism portion when it is determined to exceed.

A second infusion device according to the present invention is an infusion device which presses down an infusion tube by an infusion pump mechanism section to pressure-fed the infusion solution in the infusion tube. An air bubble sensor including an ultrasonic wave transmitter and an ultrasonic wave receiver, which are arranged opposite to each other with the tube in between, is provided, and a means for setting the size of the bubble to be detected and an infusion rate and an infusion rate are set. Means, a means for calculating the pumping speed of the infusion based on the infusion rate and the cross-sectional area of the tube, and an amount of bubbles allowed to be mixed per unit time based on the size of the bubbles to be detected and the infusion rate. Means, means for calculating a bubble integral value for each unit time based on the pumping speed of the infusion solution and the output level by the bubble sensor, and the bubble integral value for each unit time is the permissible mixed gas per unit time. It is characterized in that it comprises means for determining whether more than the amount, and means for stopping the infusion pump mechanism portion when it is determined to exceed.

Next, a third infusion device according to the present invention, which is an infusion device for squeezing the infusion tube by the infusion pump mechanism section to pump the infusion solution in the infusion tube, Information about infusion factors such as infusion rate and infusion time is recorded in a drug container or prescription, and an information reading device for reading the infusion element information is provided. It is characterized in that the information is read and stored.

Further, a fourth infusion device according to the present invention is an infusion device for compressing an infusion tube by an infusion pump mechanism section so as to pump the infusion solution in the infusion tube.
Information about elements related to infusion such as infusion rate and infusion time, and information on limit values of the elements are recorded in a drug container or a prescription, and an information reading device for reading the information is provided. The infusion element information and the limit value information are read from a container or a prescription and stored, and a warning is issued when the set infusion amount, infusion rate or infusion time deviates from the conditions of the above limit value. It is a thing.

Further, the fifth infusion device according to the present invention is
It is an infusion device that presses the infusion tube by the infusion pump mechanism section and pumps the infusion solution in the infusion tube, and records the drug code that identifies the drug type in the drug container and also records the drug code on the prescription etc. In addition, an information reading device for reading the drug code is provided, and the drug code read from the drug container is compared with the drug code read from the prescription by this information reading device, and a warning is issued when the two do not match. It is characterized by being configured in.

[0018]

In the first infusion device, the size of the bubble to be detected, the infusion rate, and the infusion rate are set, and the allowable amount of bubbles mixed in the unit volume is determined based on the bubble size and the infusion rate. calculate. The presence or absence of bubbles in the infusion solution is detected by the bubble sensor, and the bubble integral value per unit volume is calculated based on the output level of the ultrasonic wave receiver and the pumping speed. When the integrated value of bubbles per unit volume exceeds the allowable amount of bubbles mixed in the unit volume, the infusion pump mechanism section is stopped to automatically stop the infusion pumping.

Further, in the case of the second infusion device, the size of the bubble to be detected, the infusion rate and the infusion rate are set, and based on the size of the bubble and the infusion rate, the permissible mixed bubbles per unit time. Calculate the amount. The presence / absence of bubbles in the infusion solution is detected by the bubble sensor, and the bubble integral value for each unit time is calculated based on the output level of the ultrasonic wave receiver and the pumping speed. When the bubble integrated value per unit time exceeds the permissible mixed bubble amount per unit time, the infusion pump mechanism unit is stopped to automatically stop the infusion pumping.

In the case of the third infusion device, infusion element information such as infusion amount, infusion rate, infusion time, etc. is automatically input and set.

Further, in the case of the fourth infusion device, if an attempt is made to input those infusion elements outside the limit values relating to the infusion elements such as infusion volume, infusion rate, infusion time, etc., a warning is issued, so an erroneous input is made. Is prevented.

Further, in the case of the fifth infusion device, the medicine code recorded on the medicine container and the medicine code recorded on the prescription and the like are read and compared with each other. Prevent use.

[0023]

Embodiments of the infusion device according to the present invention will be described below in detail with reference to the drawings.

First Embodiment First, an outline of an infusion device (positive pressure peristaltic type intravenous infusion device) according to the first embodiment will be described with reference to FIGS.
8 is a front view of the infusion device, FIG. 9 is a perspective view of a main part showing an opened state of the pump head door, FIG. 10 is a rear view of the infusion device, and FIG. 11 is a block diagram showing an electrical configuration of the infusion device. is there.

This infusion device is an electromechanical positive pressure peristaltic intravenous infusion device having two pump heads and is used with a specified infusion set.
The device program is designed to be performed from the key panel. It is possible to switch from the auxiliary infusion flow rate programmed for the drug solution of the second path containing the drug to the other main infusion rate programmed for the drug solution of the first path of the same pump. Various alarm functions such as bubble detection, upstream blockage detection, and downstream blockage detection are provided to enhance patient safety.

Reference numeral 1 is a power switch, and when the power switch 1 is pressed, the power of the infusion device is turned on.
When the power is turned on, a self-test is automatically performed temporarily. Press the power switch 1 again to turn off the power. The internal battery is charged regardless of whether the power switch 1 is turned on or off when the infusion device is connected to the AC power source.

Reference numeral 2 denotes an alarm / warning indicator for displaying all alarms and warnings related to the infusion device. Reference numeral 3 denotes a programming display, which displays all program information relating to the infusion, such as the infusion flow rate, the planned infusion volume, and the infused volume that have been input for each of the main infusion and the auxiliary infusion. The unit of the infusion flow rate is displayed in ml / hr, and the unit of the planned infusion volume and the infused volume is in ml.

Keys 4a to 4c are main infusion keys, which are used to input the infusion flow rate, to enter the expected infusion amount, and to start the infusion device when performing only one infusion, respectively. Is used for. Input with these keys is possible only when the infusion device is stopped, after the infusion is completed, and in the main infusion mode.

Reference numeral 5 is a numerical key of "0" to "9", and numerical data for all infusions are inputted by these numerical keys 5. 6 is a clear key, and when an incorrect numerical value is input during the input of the numerical value, by pressing the clear key 6, the display can be set to "0" and the numerical value can be input again.

Reference numeral 7 denotes a stop key, which is pressed when manually stopping the infusion. After the infusion device is stopped, a warning buzzer sounds when no operation is performed on the infusion device for a period of 2 minutes. Reference numeral 8 is a buzzer stop key, and by pressing this key, the alarm / warning sound is temporarily stopped for 2 minutes. However, the display status of the alarm / warning indicator 2 is
There is no change before and after pressing the buzzer stop key 8.

Reference numerals 9a to 9c are auxiliary infusion keys, which are used to input the infusion flow rate, the planned infusion volume, and the starting of the infusion when performing the infusion. Is what is used. 10a-10
Reference numeral c is a lamp for displaying the operating state. Among these, 10a is an alarm lamp, and a red LED is used. The alarm lamp 10a blinks during the alarm mode to notify that appropriate treatment is required immediately. In this case, the cause is displayed on the alarm / warning indicator 2. 10b is an infusion lamp,
Green LEDs are used. This infusion lamp 10
b is turned on during the infusion and turned off when the infusion device is stopped. 10c is a warning lamp, which uses a yellow LED. The warning lamp 10c is turned on during the warning mode to indicate a state requiring treatment. Also in this case, the cause is displayed on the alarm / warning indicator 2.

Reference numeral 11 denotes a reset key. When this key is pressed when the infusion device is stopped, the infused amount (the total amount of the main infusion and the auxiliary infusion) is reset to "0". 12
Is the infusion volume key, and when you press this key, the volume infused (the sum of the main infusion and the supplemental infusion) is displayed, and then
The infusion flow rate and the planned infusion volume registered for the main infusion and the auxiliary infusion are displayed.

Reference numeral 13 denotes a back light key. When this key is pressed while the infusion device is operating on the AC power supply, the back lighting (not shown) of the alarm / warning indicator 2 and the programming indicator 3 is turned on. It has become. Press it again to turn off the backlight. During operation with the built-in battery, the backlight is lit only while this key is pressed.

Reference numeral 14 is a pump head door, and 14a is a door handle for opening and closing the pump head door 14.
To open the pump head door 14, use the door handle 14a
Pull up to a position sufficiently above and pull it toward you.
To close the pump head door 14, use the door handle 14
Push a after closing it in the lifted state. Reference numeral 15 is a charging lamp using a green LED, which lights up while the infusion device is connected to an AC power source, and indicates that the built-in battery is in a charging state.

In FIG. 9, reference numeral 16 denotes a pressure drop sensor, which detects a pressure drop state due to an abnormality (for example, filter clogging) in the infusion set between the drug solution bottle (chemical solution bag) and the infusion device. To do. Reference numeral 17 denotes an infusion pump mechanism section, which is a linear peristaltic infusion pump mechanism designed for a designated infusion set.

Reference numeral 18 denotes a pressure increase sensor, which detects a pressure increase state in the infusion tube due to an abnormality (for example, blockage) in the infusion set between the infusion device and the patient. Reference numeral 19 is a bubble sensor, which detects bubbles in a prescribed amount or more in the infusion tube (which will be described later). 20 is a safety clamp,
A mechanism for automatically closing the infusion tube when the pump head door 14 is opened to prevent spontaneous infusion of the infusion solution.

In FIG. 10, reference numeral 21 is a power cord holder. Reference numeral 22 denotes a panel lock switch. By pressing this lock switch 22, even if a person other than the operator (doctor or nurse) accidentally touches various keys or switches, the operation of the infusion device is unexpectedly performed. This is to avoid being changed. Reference numeral 23 is a fuse holder that incorporates a designated time-lag type fuse.

Reference numeral 24 is a volume control knob for adjusting the volume of the buzzer sounding at the time of alarm / warning. 25 is 100
It is a plug of a power cord connected to a V outlet.
Reference numeral 26 is a battery unit containing a lead storage battery. 27 is a pole clamp used when attaching to a stand. Reference numeral 28 is a nurse call connector portion for monitoring the alarm / warning state of the infusion device at the nurse center by using the nurse call kit. 29 is a buzzer.

In FIG. 11, reference numeral 30 is a CPU that is reset when the power is turned on to manage the entire infusion device, 31 is a ROM storing program data necessary for operating the infusion device, and 32 is a bubble to be detected. Size, infusion rate, infusion rate, pumping rate, allowable amount of bubbles mixed in unit volume,
It is a RAM for storing various data such as the permissible mixed bubble amount per unit time. This RAM 32 has a power source O
Even during FF, it is backed up by the battery. Two
Is an alarm / warning indicator, 3 is a programming indicator, 10
Is an operating status display lamp (10a to 10c), 16 is a pressure drop sensor, 18 is a pressure rise sensor, 19 is a bubble sensor, 20 is a safety clamp, 22 is a panel lock switch, and 29 is a buzzer.

Reference numeral 33 is a warning / warning sound buzzer drive circuit, and 3
4 includes a power switch 1, main infusion keys 4a to 4c, numerical keys 5, clear key 6, stop key 7, buzzer stop key 8, auxiliary infusion keys 9a to 9c, reset key 11 and backlight key 13. It is a key panel equipped.

The infusion pump mechanism section 17 is composed of a motor drive circuit 35, a stepping motor 36, a motor rotation phase detection circuit 37 and the like. 38 is an A / D converter,
39 is a battery voltage detection circuit. The motor drive circuit 35 controls the stepping motor 36 based on a command from the CPU 30, and the motor rotation phase detection circuit 37 detects the rotation phase of the motor 36 using a photo interrupter to detect the CPU 30.
Send to. A plurality of eccentric cams whose phases are slightly shifted are attached to the output shaft of the stepping motor 36 in a state of closely contacting in the axial direction, and an infusion tube 50 (described later, see FIG. 1) is pressed against the outer peripheral portion of each eccentric cam. The peristaltic fingers are fixed. The A / D converter 38 is
The state of the motor 36, the output level of the bubble sensor 19, and the output value of the battery voltage detection circuit 39 are converted from analog amounts into digital data and sent to the CPU 30.

Next, the structure of the bubble sensor BS1 in the infusion device will be described with reference to FIG.

The bubble sensor BS1 corresponds to the bubble sensor 19 shown in FIG. In FIG. 1, 50 is an infusion tube having a drug solution bag connected to one end and an injection needle connected to the other end. A bubble sensor BS1 is attached to an intermediate part of the infusion tube 50. Bubble sensor BS1
Is composed of an ultrasonic wave sensor 60 including an ultrasonic wave transmitter 60s and an ultrasonic wave receiver 60r.
0s and the ultrasonic wave receiver 60r are in contact with the outer peripheral surface of the liquid transfusing tube 50 in a state of facing each other in the radial direction of the liquid transfusing tube 50. In FIG. 1, reference numeral 70 denotes an infusion solution (chemical solution) flowing in the infusion tube 50, and 80 denotes bubbles mixed in the infusion solution 70. Such an infusion tube 50 is set in the infusion pump mechanism portion 17 of the infusion device.
The size of the infusion tube 50 is 0.25 cm in diameter and 0.05 cm ² in cross section.

In FIG. 1 (a), two bubbles 80 having a full cross section of the liquid transfusing tube 50 flow in a state of being close to each other. In FIG. 1B, one bubble 80 smaller than the cross section of the infusion tube 50 flows. As described later, in this embodiment, the volume of the bubble 80 is measured very accurately by measuring the cross-sectional area of the bubble 80 and integrating the cross-sectional area in the flow direction. Ultrasonic wave transmitter 6
In the state where only the infusion solution 70 passes through the infusion tube 50 with respect to the ultrasonic wave transmission path connecting the 0s and the ultrasonic wave receiver 60r, the ultrasonic wave is not attenuated so much and the ultrasonic wave receiver 60r And the output level of the ultrasonic wave receiver 60r remains high. When the bubble 80 mixed in the infusion solution 70 passes through the ultrasonic wave transmission path, the ultrasonic wave is attenuated by the bubble 80 and the output level of the ultrasonic wave receiver 60r decreases. The degree of the decrease depends on the cross-sectional area of the bubble 80. The output signal from this ultrasonic sensor 60 is A / D
It is converted into digital data by the converter 38 and CP
It is sent to U30.

FIG. 2 shows the output level of the bubble sensor BS1 and the ratio of the cross-sectional area S _B of the bubble 80 to the cross-sectional area S _T of the infusion tube 50 (bubble cross-sectional occupation rate). There is a one-to-one correspondence between the output level and the bubble cross-section occupation ratio.
For example, when the output level exceeds "300", the bubble cross-section occupation rate is 0%, which means that the bubble 80 does not pass through the ultrasonic wave transmission path. Output level is "15
When it is "0", the bubble cross-section occupation rate is 50%. When the output level is "100", the bubble cross-section occupancy rate is 80%, which is almost equivalent to (b) in FIG. When the output level is "20", the bubble cross-section occupation rate is 100%, which corresponds to (a) in FIG.

The operation for detecting bubbles in the liquid transfusing device having the above structure will be described below with reference to the flow charts shown in FIGS. 3 and 4.

When the power is turned on at the first step S1, the operations after step S2 are executed. In step S2, the bubble size setting screen shown in FIG. 5 is displayed on the programming display unit 3, so the operator uses the numeric keys 5 shown in FIG. 8 (and also the clear key 6 if necessary) to detect. Enter the size of the bubble to be used. In the case of the present embodiment, the bubble size can be set in eight steps as shown in FIG. The input numerical value indicating the size of the bubble is displayed in black and white in reverse on the bubble size setting screen.
The input bubble size data is stored in the RAM 32. Let B _B be the set bubble size. Next, in step S3, the infusion rate (infusion flow rate) w (ml / hr) and the infusion rate (scheduled infusion rate) A using the numerical key 5.
Enter (ml) and. The input data of the infusion rate w and the infusion rate A are stored in the RAM 32. Step S
In step 4, the operation of pressing the infusion start key 4c for the main infusion is awaited, and the process proceeds to step S5.

In step S5, the CPU 30 calculates the pumping speed V (cm / sec) and the infusion end time t _END . Pumping speed V, based on the infusion rate w (ml / hr) converted from the infusion rate W (ml / sec) the cross-sectional area of the infusion tube 50 S _T (cm ^2), the V = W / S _T It is calculated. That is, pumping speed (cm / s) = transfusion speed W (ml / s) / tube cross-sectional area (cm ² ). In the case of this example, the cross-sectional area S _T is 0.05 cm ² . The infusion end time t _END is the current time t ₀ and the infusion volume A
(Ml) and the infusion rate W (ml / sec), t _END = t ₀ + A / W. That is, infusion end time = current time + infusion volume (ml) / infusion rate (ml / s).

Next, in step S6, the CPU 30 sets the memories M1 to M7 required for bubble detection as follows. This setting is performed in the RAM 32.

Memory type Function Capacity (WORD) M1 Bubble integrated value memory 1 M2 100 μl Medium bubble amount loop memory 10 M3 M2 pointer 1 M4 Bubble amount per minute loop memory 60 M5 M4 pointer 1 M6 Display 10 minutes Every integration memory 128 M7 Sampling interval memory 1 The bubble integration value memory M1 adds the processed output level every time the output level of the bubble sensor BS1 is sampled. The 100 μl medium bubble amount loop memory M2 is a memory array necessary for checking the bubble amount allowed to be mixed in 100 μl as a constant infusion amount, and stores the value of the portion indicated by the M2 pointer M3. Read and write. The pointer M3 for M2 is 100μ
l Indicates a place where data is written to or read from the medium bubble amount loop memory M2, and takes a value from 0 to 9. M3
The value of M2 designated by is represented by M2 [M3] (see FIG. 6, which will be described later). The loop memory M4 for bubble amount per minute is a memory array required when checking the bubble amount allowed to be mixed in 1 minute, and reads and writes the value of the portion indicated by the M4 pointer M5. The M4 pointer M5 indicates a place where data is written to or read from the bubble amount loop memory M4 per minute, and takes a value of 0 to 59. The value of M4 designated by M5 is represented by M4 [M5]. The 10-minute display integration memory M6 is a memory that stores the amount of bubbles every 10 minutes. The sampling interval memory M7 is
The sampling interval of the bubble sensor BS1 is shown, and here it is determined by the following equation.

Sampling interval (sec) = 1 / (infusion rate (ml / s) × 100) If the infusion rate is 0, 5 ml / s, the sampling interval is 1 / (0, 5 × 100) = 1 / It becomes 50 (s), and the infusion volume flowing during this is 0, 5 (ml / s) x
1/50 (s) = 1/100 (ml) = 10 (μl). That is, the sampling interval corresponds to the time required for 10 μl of the infusion solution to pass through the bubble sensor BS1. In other words, air bubbles are sampled every 10 μl of passage, regardless of the infusion rate. In step S6, the memories M1 to M7 are set and all the memories M1 to M6 other than the sampling interval memory M7 are reset to 0.

The CPU 30 calculates the bubble determination condition in step S7. That is, based on the bubble size B _B set in step S2 and the infusion rate W set in step S3, a constant infusion amount of 100 μl to be detected.
The amount of bubbles allowed to be mixed therein and the amount of bubbles allowed to be mixed within 1 minute of a fixed time are calculated, and the respective calculation results are stored in the RAM 32. Let each be the admixture allowable bubble amount α _REF in 100 μl and the mixture allowable bubble amount β _REF per minute.

Next, the CPU 30 proceeds to step S8 to control the motor drive circuit 35 to drive the stepping motor 36 to operate the infusion pump mechanism section 17. The infusion tube 50 sandwiched between a plurality of peristaltic finger groups attached to the shaft of the stepping motor 36 and the backing plate is peristally squeezed by the sequential rotation of the peristaltic finger groups, and the infusion tube 50. The pumping of the infusion solution 70 inside will be started.

When the infusion solution 70 is pumped, the CPU 30
Advances to step S9 to obtain the amount of bubbles obtained by the bubble sensor BS1. FIG. 4 shows the operation of step S9 in detail. Hereinafter, step S9 in FIG.
The operations of -1 to S9-10 will be described.

First, in step S9-1, it is determined whether or not the current time has reached the sampling interval stored in the sampling interval memory M7 starting from the previous sampling time. If the next sampling time has not been reached, the process skips to step S9-7. When performing step S9-1 for the first time,
When the next sampling time is reached, step S9
-2. When it proceeds to step S9-2, the bubble sensor B
The output level of S1 is read through the A / D converter 38 and used as the bubble sensor output value. Next, in step S9-3, the ratio of the cross-sectional area S _{B of the} bubble 80 to the cross-sectional area S _T of the infusion tube 50, that is, the bubble cross-sectional occupancy ratio is calculated as described in FIG. It is assumed that the relationship between the bubble sensor output value and the bubble cross-section occupation rate is stored in advance in the form of a table in the ROM 31 in a state corresponding to the characteristics shown in FIG.

As described above, the sampling interval is 10
Since it is the time for μl of the infusion solution to pass, the bubble cross-section occupancy rate indicates the proportion of bubbles in 10 μl of the infusion solution before and after the bubble sensor BS1. Since it is shown in the unit of percentage here, the quotient when it is divided by 10 is the detected bubble amount (unit: μl).

At the next step S9-4, the CPU 3
For 0, the bubble cross-section occupancy rate (that is, the detected bubble amount) obtained in step S9-3 is added to the bubble integrated value memory M1. As a result, the bubble integrated value M1 is 10 times the value (unit: μ) of the cumulative amount of detected bubbles since the infusion was started.
l) will be shown.

In step S9-5, the bubble integral value M1 [M2 [M] 100 μl before the bubble integral value M1 up to the present time.
3] is subtracted to obtain a value (unit: μl) that is 10 times the amount of bubbles mixed in the latest 100 μl of infusion solution, and the result is taken as the amount of bubbles in 100 μl.

Here, the array M2 [M3] will be described. The array M2 [M3] is a loop memory,
As shown in FIG. 6, the bubble integral value of the past 100 μl was 10
Each μl is arranged in a loop. Therefore, M3
After writing the bubble integration value in the second M2, M3
If you set it to indicate the address of 2, the M3 of M3 is 1
This is the bubble integration value before 00 μl. Therefore, in the next step S9-6, the bubble integration value M1 obtained this time is substituted into M2 [M3], and the M2 pointer M3 is incremented by +1. In this increment, when the result becomes 10 or more, the surplus of 10 is calculated so as to return to 0. That is, when 9 + 1 = 10, 10-10 = 0. Note that M2 [M3] obtained in step S9-6 is 10
It will be subtracted in step S9-5 when 0 μl has flowed.

Step S9-1 or step S9-6
From step S9-7, it is determined whether one second has elapsed from the time of the previous writing in the loop memory M4 for bubble amount per minute. When the time has not yet passed, the process skips to step S9-10 even if sampling is performed in steps S9-2 to S9-4. When step S9-7 is performed for the first time and when one second has elapsed, the process proceeds to step S9-8 even if the sampling in steps S9-2 to S9-4 is not performed. In step S9-8, the CPU 30 sets M4 [M which is the bubble integrated value one minute before the bubble integrated value M1 obtained in the latest step S9-4.
5] is subtracted to obtain a value (unit: μl) that is 10 times the amount of bubbles mixed in the latest infusion solution per minute,
The result is defined as the amount of bubbles per minute.

Here, the array M4 [M5] will be described. The array M4 [M5] is a loop memory,
It is assumed that the bubble integrated values for the past 1 minute (60 seconds) form a loop every 1 second. Therefore, M5th M
If M5 is set to indicate the address of the next M4 after writing the bubble integral value in 4, the M5th M4 is the bubble integral value one minute before. Therefore, in the next step S9-9, the latest bubble integral value M1 is set to M4.
Substitute in [M5], and increment the M4 pointer M5 by +1. In this increment, when the result becomes 60 or more, the surplus of 60 is calculated so as to return to 0. That is, when 59 + 1 = 60, 60-60 =
It is set to 0. Note that M4 [M5] obtained in step S9-9 will be subtracted in step S9-8 when one minute has elapsed thereafter.

Step S9-7 or Step S9-9
From step S9-10, the bubble integration value M1 at the current time obtained in step S9-4 is substituted into the display 10-minute integration memory M6 indicating the bubble integration value every 10 minutes. Then, the process proceeds to step S10 in FIG.

Now, in step S10, it is determined whether "with bubbles" or "without bubbles". That is, the amount of bubbles in 100 μl obtained in step S9-5 is 100 μl which is the bubble determination condition calculated in step S7.
Whether or not the allowable amount of air bubbles mixed in α _REF is exceeded, and whether the amount of bubbles per minute obtained in step S9-8 is S
It is determined whether or not the permissible mixed bubble amount per minute β _REF , which is the bubble determination condition calculated in 7, is exceeded. M2 ≦ α
_{When REF} and M4 ≦ β _REF , it is determined that “no bubbles”, the process proceeds to step S11, and it is determined whether the stop key 7 is pressed. When the push operation is performed, the process proceeds to step S15, the motor drive circuit 35 is controlled, and the stepping motor 36 is stopped to stop the infusion pump mechanism unit 17 and interrupt the infusion operation. When the stop key 7 is not pressed, the process proceeds to step S12, and it is determined whether the infusion is completed. That is, it is determined whether or not the infusion end time t _END previously obtained in step S5 has been reached, and if it has reached, the process proceeds to step S15 and the stepping motor 3
6 is stopped to stop the infusion, and if not reached, the process proceeds to step S13.

After proceeding to step S13, the CPU 30
The array M6, that is, the contents of the 10-minute display integration memory M6, which is the bubble integration value every 10 minutes, is graphically displayed on the programming display 3. First value of array M6 [0]
Indicates the amount of bubbles in the first 10 minutes. T minutes after the start of the infusion thereafter (T is a value of 10, 20, 30, 40 every 10 minutes)
The amount of bubbles (takes ……) is calculated by the following formula.

Bubble integration value every 10 minutes = M6 [T / 1
0] -M6 [T / 10-1] This value is graphically displayed in the infusion volume bubble display screen shown in FIG. 7. In the graph on the screen, the horizontal axis represents time and the vertical axis represents the amount of bubbles. The numerical value indicated by reference numeral 70 at the bottom of the screen indicates the cumulative amount of bubbles in the infusion solution after starting the infusion solution.
After step S13, the process returns to the bubble amount measurement routine of step S9 (see FIG. 4), and the same operation is repeated thereafter.

In step S10, contrary to the above,
When M2> α _REF or M4> β _REF ,
When it is determined that "there are bubbles", the process proceeds to step S14 and an alarm /
The warning indicator 2 displays a warning of "bubble inclusion", the warning lamp 10a is turned on, and the buzzer 29 is activated.
Sound a warning sound. Then step S
In step 15, the motor drive circuit 35 is controlled to stop the stepping motor 36, thereby stopping the infusion pump mechanism unit 17 and interrupting the infusion operation.

The above is the embodiment, but in the case of detecting even fine bubbles, it is possible to deal with it by increasing the sampling speed. In addition, if the infusion rate varies depending on the situation of the infusion pump mechanism unit 17, it is possible to deal with it by adjusting the sampling rate according to the variation. Further, in order to improve the reliability, a plurality of bubble sensors BS1 may be prepared and the same processing may be performed on the output of each ultrasonic wave receiver.

Second Embodiment Next, an infusion device (positive pressure peristaltic type intravenous infusion device) according to a second embodiment will be described. FIG. 12 is a block diagram showing the electrical configuration of a peristaltic infusion pump.

Since the configuration corresponding to FIGS. 8, 9 and 10 of the first embodiment is similar, it will be omitted. In FIG. 12, 40 is a bar code reader as an optical information reader, 41 is an accessory terminal, 42 is a bar code reader interface circuit, and the bar code reader 4
0 is connected to the bar code reader interface circuit 42 via the accessory terminal 41, and the bar code reader interface circuit 42 is connected to the CPU 30. The bar code reader interface circuit 42 always reads data from the bar code reader 40 when the infusion pump mechanism unit 17 is powered on, and the latest data is stored in a buffer in the bar code reader interface circuit 42. When the CPU 30 requests data, the data is transferred. Further, when there is a reset command from the CPU 30, the data in the buffer is erased. Since other configurations are the same as those of the first embodiment shown in FIG. 11, the corresponding or corresponding portions will be denoted by the same reference numerals and description thereof will be omitted.

There are two types of bar codes, which are the information to be read by the bar code reader 40, those printed on the drug container and those printed on a prescription.

Bar code content of drug container (drug container code) Drug container code ID, drug code, maximum infusion amount, maximum infusion time, maximum infusion rate, minimum infusion amount, minimum infusion time, minimum infusion rate, container volume prescription, etc. Bar code contents (prescription code) Prescription code ID, drug code [[, drug code] ...
・] [, Infusion volume], [, infusion rate], [, infusion start time] Drug container code ID: Unique value indicating that this code is a drug container code Prescription code ID: This code is a prescription code Unique value to indicate Drug code: A code that identifies the type of drug attached to each drug.

The prescription drug code can specify two or more types of drugs.

Maximum infusion amount: Maximum infusion amount allowed to infuse the drug into the body Maximum infusion time: Maximum infusion time allowed to infuse the drug in the body Maximum infusion rate: Relevant Maximum infusion rate allowed to inject the above drug into the body Minimum infusion amount: Minimum infusion amount allowed to inject the relevant drug into the body Minimum infusion time: Infusion of the relevant drug into the body Minimum value of infusion time allowed Minimum infusion rate: Minimum infusion rate allowed to inject the drug into the body Container capacity: Volume of the container for the drug Infusion rate: Infusion rate indicated by prescription Infusion rate : Infusion speed instructed by prescription Infusion start time: Infusion start time instructed by prescription. The infusion device starts infusion at this time.

[]: The contents of the parentheses can be omitted if necessary.

...: Repeatedly input as necessary.

Regarding the prescription code, when a plurality of medicines are infused at the same time, the same number of medicine codes can be incorporated. Moreover, the prescription code is prepared by the number when a plurality of infusions are continuously performed. If both the prescription code and the drug container code do not fit in one bar code, a plurality of codes will be considered as one code.

The operation of the liquid transfusing device according to the second embodiment will be described with reference to the flow charts shown in FIGS.

In step F1, power switch 1 of the infusion device
Is input, the CPU 30 causes the RAM 3 to operate in step F2.
Clear 2. Next, in step F3, it is determined whether or not the numerical key 5 (clear key 6 if necessary) is input, and if there is input, it is assumed that the infusion volume and the infusion rate are input, and the process proceeds to step F4. The data of the infusion volume and the infusion rate are stored in the RAM 32. Subsequent to step F4, and when it is determined in step F3 that there is no key input, the process proceeds to step F5 and it is determined whether or not the barcode has been input by the barcode reader 40. If no barcode is entered, proceed to step F6,
Determine whether the infusion start key 4c has been pressed,
If it is not operated, the process returns to step F3 to prompt the input work. If it is operated, the process proceeds to step F11.

When it is determined in step F5 that the bar code is input, the process proceeds to step F7, and it is determined whether the recognized bar code is the drug container code attached to the drug container by checking the drug container code ID. To do. When it is determined that the code is a drug container code, the process proceeds to step F8, where the drug code contained in the drug container code, maximum infusion rate, maximum infusion rate, maximum infusion time, minimum infusion rate, minimum infusion rate, minimum infusion time, The container volume is stored in the RAM 32 and displayed on the programming display 3. FIG. 18 shows an example of the display screen at that time. In FIG. 18, the code “123456” is the drug code and the RATE is “10”.
0-1500 "is the minimum infusion rate-maximum infusion rate, VTB
"0-600" of 1 is the minimum infusion volume-maximum infusion volume, TIM
"00: 00-99: 99" of E is the minimum infusion time-maximum infusion time, and "650" of NET is the container volume. After step F8, the process returns to step F3 to repeat the input work.

If it is determined in step F7 that the code is not the medicine container code, the process proceeds to step F9 and step F5.
It is determined by checking the prescription code ID whether or not the barcode recognized in step 1 is the prescription code attached to the prescription. If the code is not a prescription code, the flow advances to step F10 to display an error message on the alarm / warning indicator 2, and then the flow returns to step F3 to repeat the input operation. When it is determined that the code is a prescription code, the process proceeds to step F17 shown in FIG. 15 (steps F17 and subsequent steps will be described later).

Steps F3 to F4 → F5 → F7 → F8
→ F3 → F5 → F6, and step F1 shown in FIG.
Suppose that it moved to 1. In step F11, the infusion time is calculated from the infusion volume and infusion rate set in step F4.
It is calculated based on the calculation formula of [transfusion time = transfusion amount / transfusion speed]. Next, in step F12, it is judged whether or not the infusion rate set in step F4 is within the range of the minimum infusion rate and the maximum infusion rate in the medicine container code recorded in step F8. For example, after proceeding to step F16 to display an error on the programming indicator 3, the procedure returns to step F3 to repeat the input work.

If the minimum infusion rate <infusion rate <maximum infusion rate, the process proceeds to step F13, and the infusion rate set in step F4 is the minimum infusion rate and the maximum infusion rate in the medicine container code recorded in step F8. It is determined whether or not it is within the range, and if it is out of the range, the process proceeds to step F16 to display an error on the programming indicator 3, and then the process returns to step F3 to repeat the input work.

If the minimum infusion amount <infusion amount <maximum infusion amount, the process proceeds to step F14, and the infusion time calculated in step F11 is the range between the minimum infusion time and the maximum infusion time in the medicine container code recorded in step F8. It is determined whether or not it is within the range, and if it is out of the range, the process proceeds to step F16 to display an error on the programming display unit 3, and then the process returns to step F3 to repeat the input work.

If the minimum infusion time <infusion time <maximum infusion time, it is determined that the infusion conditions are satisfied, and step F15 is performed.
Then, the motor drive circuit 35 is controlled to drive the stepping motor 36 to start infusion.

As described above, steps F12, F13,
After making a judgment in F14 and displaying an error in step F16 when the result is negative, the process returns to step F3 and the input work is repeated, so it is possible to reliably prevent human input errors. You can

If the read bar code is not a drug container code but a prescription code, step F in FIG.
It progresses from 9 to step F17 shown in FIG. Step F
17, the medicine code of the prescription code is stored in the RAM 32
It is registered in the memory area M inside. Next, in step F18, it is determined whether or not the infusion rate is recorded in the prescription code, and if it is recorded, the procedure proceeds to step F19 to set the infusion rate in the RAM 32, and then in step F
However, if the infusion rate is not recorded, the process directly proceeds to step F20. In step F20, it is determined whether or not the transfusion amount is recorded in the prescription code, and if it is recorded, the process proceeds to step F21 to set the transfusion amount in the RAM 32, and then proceeds to step F22, but the transfusion amount is recorded. If not, just step F22
Proceed to. In step F22, it is determined whether or not the infusion start time is recorded in the prescription code, and if it is recorded, the process proceeds to step F23 and the infusion start time is stored in the RAM.
After setting to 32, the process proceeds to step F24, but if the infusion start time is not recorded, the process proceeds to step F24 as it is.
Proceed to. Then, in step F24, step F
The programming indicator 3 displays the data set in steps 17 to F23.

FIG. 19 shows an example of the display screen. The infusion rate is displayed as "125", the infusion volume is displayed as "500", and two types of drugs are registered.
"B" is displayed. In step F26 of FIG. 16 to be described next, when the prescription code is read twice or more for continuous infusion, the display state of the programming display 3 becomes as shown in FIG. Here, it is shown that the infusion is performed with the values following 1, 2 and 3 below N in the first column, and the drug indications A and B are overlapped that the same drug is used. Means

In step F25 shown in FIG. 16, it is judged whether or not the bar code is read by the bar code reader 40. If the bar code is read, step F26 is executed.
If not, the process proceeds to step F33 shown in FIG.

At step F26, whether or not the barcode recognized at step F25 is the prescription code attached to the prescription is judged by checking the prescription code ID. If it is the prescription code, the process returns to step F17 of FIG. ,
The prescription code read this time is next to the prescription code read last time, and as the content to be continuously infused, the processing of step F17 and thereafter is performed. When the barcode is not the prescription code, the process proceeds to step F27.

At step F27, it is judged whether or not the bar code recognized at step F25 is the medicine container code attached to the medicine container by checking the medicine container code ID. If it is the medicine container code, the procedure goes to step F29. If not, the process proceeds to step F28, and since the recognized barcode is neither the drug container code nor the prescription code, an error is displayed on the alarm / warning indicator 2 as an error in the barcode, and the process proceeds to step F33 in FIG. move on. If it is the medicine container code, the process proceeds to step F29, and it is determined whether the medicine code of the medicine container code recognized in step F25 is registered in the memory area M. If the medicine code is not registered in the memory area M, it means that the wrong medicine is to be used. Therefore, the process proceeds to step F32, an error is displayed on the alarm / warning indicator 2, and the process proceeds to step F33. When the medicine code is registered in the memory area M, the medicine is regarded as being used correctly and the process proceeds to step F30 to delete the medicine code from the memory area M. Then, the process proceeds to step F31, the fact that the medicine is correctly selected is displayed on the programming display device 3, and the process proceeds to step F33.

An example of screen display in step F31 is shown in FIG.
And shown in FIG. 21 corresponds to FIG. 19, and FIG. 22 corresponds to FIG. It is shown that the selected medicine is correctly selected by displaying the selected medicine in black and white.

In step F33 shown in FIG. 17, it is determined whether or not the numeric key 5 has been pressed. If there is a key input, it is assumed that the infusion volume and the infusion rate are being input, and the flow proceeds to step F34. After the input infusion volume and infusion rate are stored in the RAM 32, the process proceeds to step F35. If there is no key input, the process directly proceeds to step F35. In step F35, it is determined whether or not the infusion start key 4c has been pressed, and if it has not been pressed, FIG.
If it is operated, the process proceeds to step F37. In step F36, it is determined whether or not the infusion start time has been reached. If it is not the infusion start time, the process returns to step F25, and steps F25 to F36 are repeated, but if the infusion start time is reached, step F37.
Proceed to.

When the process proceeds to step F37, step F17
The drug code registered in the memory area M in step F3
At 0, it is determined whether or not the memory area M is empty as a result of all deletion. That is, it is judged whether or not all drug selections are correct. If the memory area M is not empty, it is understood that at least one or more medicines have been selected by mistake. Therefore, the process proceeds to step F39, and the warning / warning indicator 2 displays a warning, and then the step F25. Return to. When the memory area M is empty, it is found that all the selected medicines are correct, so the process proceeds to step F38, and the motor drive circuit 3
5 is controlled to drive the stepping motor 36 to start the infusion by the infusion pump mechanism unit 17.

Although the bar code reader is used as the information reading device in the above embodiment, when the information amount of the code increases and the usability of the bar code information becomes poor, the code with the increased information amount is magnetically recorded. It may be replaced with a medium or an IC card.

When the code is not described on the medicine container, the medicine container code is recorded in the medicine container when the medicine is supplied at a pharmacy or the like. Also, when issuing a prescription, the prescription code is recorded.

[0096]

According to the first infusion device of the present invention,
The size of the bubble to be detected can be selected, and the allowable bubble amount mixed in the unit volume is determined as the bubble determination condition based on the bubble size and the infusion rate, and the actual measurement value by the ultrasonic bubble sensor is the bubble determination condition. When it exceeds, the infusion pumping is automatically stopped, so that it is possible to improve the detection accuracy as the amount of bubbles mixed in the infusion per unit volume of the infusion and improve the safety of the infusion device.

Further, according to the second liquid transfusing device of the present invention, the size of the bubble to be detected can be selected, and the permissible mixed bubble amount per unit time is determined as the bubble judging condition based on the size of the bubble and the liquid transfusing speed. When the actual value measured by the ultrasonic bubble sensor exceeds the bubble determination condition, the infusion pumping is automatically stopped, so the amount of bubbles mixed in the infusion solution should be increased per unit time to improve the detection accuracy. Therefore, the safety of the infusion device can be improved in the same manner as above.

According to the third liquid transfusing device of the present invention, the information reading device can automatically input and set the liquid transfusing element information such as the liquid transfusing amount, the liquid transfusing speed, the liquid transfusing time, and the like, so that the labor can be saved.

Further, according to the fourth infusion device of the present invention, when the infusion element such as the infusion amount, the infusion rate, and the infusion time is input, the limit value for the infusion element is read by the information reading device, When the input infusion element deviates from the limit value, a warning is automatically issued, so erroneous input can be prevented.

Further, according to the fifth infusion device of the present invention, the information reading device reads the drug code recorded on the drug container and the drug code recorded on the prescription and compares them, and when they do not match, Since the warning is issued, it is possible to avoid the risk of using the wrong medicine.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a bubble sensor in an infusion device (positive pressure peristaltic intravenous infusion device) according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a relationship between a bubble sensor output level and a bubble cross-section occupation rate in the first embodiment.

FIG. 3 is a flowchart for explaining the operation of the first embodiment.

FIG. 4 is a flowchart showing a detailed operation of infusion measurement (step S9) in FIG.

FIG. 5 is a display state diagram of a bubble size setting screen in the first embodiment.

FIG. 6 is an explanatory diagram of a 10 μl medium bubble amount loop memory in the first embodiment.

FIG. 7 is a display state diagram of an infusion liquid bubble amount display screen in the first embodiment.

FIG. 8 is a front view showing the outer appearance of the infusion device (intravenous injection device) of the first embodiment.

FIG. 9 is a perspective view of essential parts showing a state where the pump head door is opened in the infusion device (intravenous infusion device) of the first embodiment.

FIG. 10 is a rear view showing the external appearance of the infusion device (intravenous injection device) of the first embodiment.

FIG. 11 is a block diagram showing an electrical configuration of the infusion device according to the first embodiment.

FIG. 12 is a block diagram showing an electrical configuration of an infusion device (intravenous infusion device) according to a second embodiment.

FIG. 13 is a flowchart for explaining the operation of the second embodiment.

FIG. 14 is a flowchart for explaining the operation of the second embodiment.

FIG. 15 is a flowchart for explaining the operation of the second embodiment.

FIG. 16 is a flowchart for explaining the operation of the second embodiment.

FIG. 17 is a flowchart for explaining the operation of the second embodiment.

FIG. 18 is a display state diagram of the programming display unit in the second embodiment.

FIG. 19 is a display state diagram of the programming display unit in the second embodiment.

FIG. 20 is a display state diagram of the programming display unit in the second embodiment.

FIG. 21 is a display state diagram of the programming display unit in the second embodiment.

FIG. 22 is a display state diagram of the programming display unit in the second embodiment.

FIG. 23 is a cross-sectional view showing a structure of a bubble sensor in an infusion device according to a conventional example.

[Explanation of symbols]

 2 …… Alarm / Warning indicator 3 …… Programming indicator 5 …… Numerical key 17 …… Infusion pump mechanism 19 …… Bubble sensor 29 …… Buzzer 30 …… CPU 32 …… RAM 36 …… Stepping motor 40… ... Bar code reader 50 ... Infusion tube 60 ... Ultrasonic sensor 60s ... Ultrasonic wave transmitter 60r ... Ultrasonic wave receiver 70 ... Infusion solution 80 ... Bubble BS1 ... Bubble sensor

Claims (5)

[Claims] 1. An infusion device for compressing an infusion tube by an infusion pump mechanism section to pump the infusion solution in the infusion tube, wherein the infusion device is arranged opposite to the outer peripheral surface of a middle portion of the infusion tube with the tube sandwiched therebetween. A bubble sensor consisting of an ultrasonic wave transmitter and an ultrasonic wave receiver is provided, and means for setting the size of the bubble to be detected, means for setting the infusion rate and infusion volume, and an infusion rate and a tube cross-sectional area are provided. Means for calculating the pressure-feeding speed of the infusion based on the size of the bubble to be detected and the speed of the infusion, means for calculating the amount of bubbles allowed to be mixed in the unit volume, the pressure-feeding speed of the infusion and the bubble sensor Means for calculating the bubble integral value per unit volume based on the output level by the, and means for determining whether or not the bubble integral value per unit volume exceeds the permissible bubble amount mixed in the unit volume, And a means for stopping the infusion pump mechanism section when it is determined that the infusion apparatus is provided. 2. An infusion device for compressing an infusion tube by an infusion pump mechanism section to pump the infusion solution in the infusion tube, wherein the infusion device is arranged opposite to the outer peripheral surface of a middle portion of the infusion tube with the tube sandwiched therebetween. A bubble sensor consisting of an ultrasonic wave transmitter and an ultrasonic wave receiver is provided, and means for setting the size of the bubble to be detected, means for setting the infusion rate and infusion volume, and an infusion rate and a tube cross-sectional area are provided. Means for calculating the pressure-feeding speed of the infusion based on the size of the bubbles to be detected and the speed of the infusion, a means for calculating the amount of bubbles allowed to be mixed per unit time, the pressure-feeding speed of the infusion and the bubble sensor Means for calculating the bubble integral value every unit time based on the output level by, and means for determining whether or not the bubble integral value at every unit time exceeds the permissible mixed bubble amount per unit time, An infusion device comprising: means for stopping the infusion pump mechanism when it is determined that the number exceeds the limit. 3. An infusion device for compressing an infusion tube by an infusion pump mechanism section to pump the infusion solution in the infusion tube, wherein information on elements related to the infusion such as an infusion volume, an infusion rate, and an infusion time is stored in a drug container or An infusion device characterized by being provided with an information reading device which is recorded on a prescription or the like and reads the infusion element information, and the information reading device is configured to read and store the infusion element information from a drug container, a prescription or the like. . 4. An infusion device for compressing an infusion tube by an infusion pump mechanism to pump the infusion solution in the infusion tube, wherein information about the infusion element such as infusion volume, infusion rate, infusion time and the like. Information on the limit value is recorded on a drug container or prescription, and an information reading device for reading the information is provided. The infusion element information and the limit value information are read from the drug container or prescription by the information reading device and stored. An infusion device characterized in that a warning is issued when the set infusion volume, infusion rate or infusion time exceeds the limit value condition. 5. An infusion device for compressing an infusion tube by an infusion pump mechanism to pump the infusion solution in the infusion tube, wherein a drug code for identifying a drug type is recorded in a drug container and used as a prescription. Also, a drug code is recorded, an information reading device for reading the drug code is provided, and the drug code read from the drug container is compared with the drug code read from the prescription by this information reading device. An infusion device, characterized in that it is configured to warn.